Guide: Find my GPS location using Google maps

Step 1: Open the maps app on your phone. This guide uses an android device as an example

Step 2: Tap and hold at the location you observed a solitary wave

Step 3: Either share a link to the location using the menu at the bottom of your screen or copy the coordinates appearing in the search bar.

Step 4: Paste the link or coordinates in the Contribute data form.

Below I have copied an example near Linlithgow.